安装es(elasticsearch)遇到问题总结

[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[3]: max number of threads [2048] for user [elk] is too low, increase to at least [4096]

1.
vim /etc/security/limits.conf
在末尾追加以下内容(elk为启动用户,当然也可以指定为*)
elk soft nofile 65536   
elk hard nofile 65536


2.
切换到root用户
执行命令:
sysctl -w vm.max_map_count=262144
查看结果:
sysctl -a|grep vm.max_map_count
显示:
vm.max_map_count = 262144
 
上述方法修改之后,如果重启虚拟机将失效

解决办法:
在   /etc/sysctl.conf文件最后添加一行
vm.max_map_count=262144
即可永久修改


 3. 查看用户最大线程数
	ulimit -a
     修改用户最大线程数
         ulimit -u 4096
     vim /etc/security/limits.conf
     elk soft nproc 4096
     elk hard nproc 4096


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